Notify is the slick new menu bar extra that notifies you of new email in your Gmail inbox. The UI is sexy, sports helpful features such as tabs and multiple accounts, has growl support and works with gmail for your domain. [Check it out](http://vibealicious.com/apps/notify/). (Free!)
As more and more everyday communication takes place over email, lots of people have complained about how hard it is to read and respond to every message. This is because they actually read and respond to all their messages. Read more.